Chengdu Huayuan Electric Equipment Co.,Ltd
LGK-40/63/100IGBT OPERATOR’S MANUAL
15
Troubleshooting & repair
1.
If there is trouble caused by high voltage in the machine, a professional electrician or serviceman of our company is
required to repair it.
2.
Please check following first when there is trouble.
1)
The three-phase power should be 380±40VAC
，
check if it misses phase or voltage fluctuation exceeds its required range of
power supply
；
2)
Check if the supply abnormity indicator lamp is ON. If it is ON, check if the three-phase power switch of distribution box is
damaged, and if the fuse and the machine power wire are well equipped. Otherwise it will cause phase missing or bad
contact, which makes the machine work abnormally
；
3)
Check if the torch switch and its wire are damaged or short-circuit, and if the nozzle and electrode are damaged
；
4)
Check if the cutting ground wire is well connected
；
5)
Check if the water in compressed air filter fixed at the back of machine is drained regularly
；
6)
Open the machine top cover to check if the lead-typed fuse next to the control transformer has been fused
；
Ordinary trouble and repair as following diagram
If the troubles cannot be resolved, please inform our local agent of the specific problems or
contact us directly.
Trouble
Reasons
Solutions
1. When the power
is switched on, the
lamp and the digital
meter are not ON.
1.Three-phase power misses phase
2.Supply power is damaged
3.Power control fuse 1.5A is
broken
1.Check three-phase power source
2.Change power switch
3.Change power control fuse
2
．
Supply abnormity
indicator lamp is ON
without arc striking
1
．
Three-phase power misses phase
2. Three-phase power over voltage
or under voltage
Check three-phase power source to
ensure the supply voltage accordance
with the supply requirements.
3. No arc striking or
arc breaking during
cutting.
Overheat
indicator
lamp
is
ON.
1
．
The ambient temperature is too
high.
2
．
When cutting, cooling fan
rotates slowly or do not rotate, so
the cooling effect is bad.
3
．
Temperature relay is damaged
1
．
Let the cutter rest for a while, and
will come to work normally later.
2
．
Check fan power source or change
cooling fan
3
．
Change temperature relay
4. No arc striking,
supply
abnormity
indicator lamp and
overheat lamp are
not ON.
1
．
Cutting ground wire is not well
connected.
2
．
Gas pressure is too high.
3
．
Torch electrode and nozzle are
badly broken.
4
．
Torch is damaged.
1
．
Connect the cutting ground wire well
2
．
Lower the pressure of gas supply
3
．
Change the electrode and nozzle
4
．
Change the torch
5.
Weak
cutting
quality
1
．
Gas pressure is too high or too
low.
2
．
Workpiece is too thick
3
．
Torch electrode and nozzle are
broken
4
．
Plasma arc is not perpendicular
to the workpiece
5
．
Cutting speed is too fast or too
slow
1
．
Adjust gas pressure
2
．
The thickness of workpiece should
be within the quality cutting range.
3
．
Change electrode and nozzle
4
．
Adjust torch angle
5
．
Adjust cutting speed
Summary of Contents for LGK-63/100MA
Page 18: ......
